67SS509

iTrader: (25)

I've got an ERL Superdeck I 4 bolt with 1/2" studs short block that I'm thinking about replacing my 427 with. It's a 4.190 bore and 4" stroke....441 cubes. I want to shoot it with a 400 shot and my concern is will I have head gasket sealing problems, especially between the bores? Don't really want the hassles with oringing. Anyone out there with success on a 4.190" or 4.185" bore and big shot of N2O?

LSX-coupe

iTrader: (1)

I would recommendto go smaller bore like 4.155 or 4.165. You will be alot better off.

99tramsamc/fia

iTrader: (2)

Look at cometic gaskets, then make a steel shim gasket that dose not need o-rings, they would be prefect for what you are trying to do.

STROKER R/T

copper and o'ring !! all the way ...love the seal

SSPerformance

iTrader: (76)

Dont start off that big... You will have no room for clean ups when you hurt something. Start out with a 4.155 bore so when you hurt it or freshen it you have the room.

67SS509

iTrader: (25)

The only way I would try this without oringing would be if the Chevy LS9 gasket was available with a bore big enough. I don't believe Cometics are up to the job but they are probably the only MLS available.
I just don't know if it's gonna take a double oring or what and a copper gasket. I got this short block for cheap with the 4.190 bore so I'm trying to make the best of it. Besides, the big cubes is good in my book if I can make it live.